Burning of a candle wax-1. Is it a physical or chemical changes?
2.Is it reversible or irreversible?
Burning of a candle wax-1. Is it a physical or chemical changes?
2.Is it reversible or irreversible?
a) Burning of a candle is both a physical and a chemical change
Candle is made up of a solid block of wax with a wick embedded in it.
1) Physical Change
When candle is lit, the heat of the flame melts the solid wax to liquid wax. This signifies a physical change from solid state to liquid state.
2) Chemical Change
The wax acts as a fuel when we light the candle and is basically a chemical substance called carbon. The carbon combines with oxygen to form another chemical substance called carbon dioxide. Also the unburnt carbon is deposited as black substance called soot. This signifies a chemical change.
(b) Burning of a candle is an irreversible change.
a) Burning of a candle is both a physical and a chemical change
Candle is made up of a solid block of wax with a wick embedded in it.
1) Physical Change
When candle is lit, the heat of the flame melts the solid wax to liquid wax. This signifies a physical change from solid state to liquid state.
2) Chemical Change
The wax acts as a fuel when we light the candle and is basically a chemical substance called carbon. The carbon combines with oxygen to form another chemical substance called carbon dioxide. Also the unburnt carbon is deposited as black substance called soot. This signifies a chemical change.
(b) Burning of a candle is an irreversible change.
